Management question help please

two alternative routes for a new motorway are being evaluated. route A follows a valley along a river and Route B takes a short cut through difficult terrain and a range of rocky hills. traffic on either route is predicted to average 4,000 vehicles/day, 25% of which will be commercial traffic

I have attached a file with all the relevant information

Compare the alternative routes based on the net present value of costs over a 30 year life and an annual discount rate of 7%, and decide which alternative is more cost effective.